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 Post subject: Mystery tube, Frankenstein
PostPosted: May Sun 12, 2019 7:33 pm 
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Octal base. All hypothications and hyperbolations welcome.

Norman

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 Post subject: Re: Mystery tube, Frankenstein
PostPosted: May Mon 13, 2019 6:55 am 
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Location: Near Portland, OR
A modern art sculpture, perhaps? :D


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 Post subject: Re: Mystery tube, Frankenstein
PostPosted: May Mon 13, 2019 12:12 pm 
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It’s the prototype for R2D2

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 Post subject: Re: Mystery tube, Frankenstein
PostPosted: May Mon 13, 2019 7:12 pm 
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Location: Dallas, TX
I assume it has no markings on it. It is possible that it isn't a commercial product, maybe something made for an experiment.

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 Post subject: Re: Mystery tube, Frankenstein
PostPosted: May Mon 13, 2019 7:36 pm 
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No question that it was experimental. "H-2328" is hand painted on the arbor below the pinch. The cathode is located at the bottom. Above that there are a three rectangular holes in beam forming/focusing grids. The middle rectangular hole is in the toroid structure. Next are a couple of straight grid wires perpendicular to the beam and parallel to the wide side of the beam. These grids have separate electrical connections outside the tube. These are followed by four electrically common straight grid wires parallel to the beam and pointing down toward the cathode. Two plates consisting of partial cylinders located at the top provide a clue to the basic function being related to beam splitting or modulation.

Norman

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 Post subject: Re: Mystery tube, Frankenstein
PostPosted: May Mon 13, 2019 9:12 pm 
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Ok, I figured it out. It is an early version of the Flux Capacitor used for storing 1.21 gigawatts for time travel

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 Post subject: Re: Mystery tube, Frankenstein
PostPosted: May Mon 13, 2019 9:14 pm 
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Location: Orlando, FL, USA
I am pretty sure this exact tube was pictured in an issue of the Tube Collectors Association magazine. I am pretty sure it is an RCA experimental type that did not result in a standard type.


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 Post subject: Re: Mystery tube, Frankenstein
PostPosted: May Mon 13, 2019 11:18 pm 
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Jim, Although I did not recall the published photo, the information on the tube is consistent with my understanding.

Norman

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 Post subject: Re: Mystery tube, Frankenstein
PostPosted: May Wed 15, 2019 4:46 am 
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When I saw it, I thought... Norm has been at Lud's.


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 Post subject: Re: Mystery tube, Frankenstein
PostPosted: May Wed 15, 2019 4:51 am 
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Location: Riverside Ca. 92504
Is that a skeleton key hiding in that tube?? It just may be the angle of the picture but it sure looks likes a key Maybe it is the lost key to the castle. Tom


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 Post subject: Re: Mystery tube, Frankenstein
PostPosted: May Thu 16, 2019 6:03 am 
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Greetings to Norman and the Forum:

Split anode magnetron?

Regards,

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 Post subject: Re: Mystery tube, Frankenstein
PostPosted: May Sat 18, 2019 5:34 pm 
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imagine what it cost new. Probably $400 in 1935.
Mark Oppat


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 Post subject: Re: Mystery tube, Frankenstein
PostPosted: May Sun 19, 2019 1:24 am 
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Location: Petaluma, California
I had a friend who's father was a glassblower at the Hanford Nuclear Res. in Washington state. Can you imagine how the above tube was made? Getting those fingers on the top and out the side as well as the insert at the bottom, no mean feat.

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 Post subject: Re: Mystery tube, Frankenstein
PostPosted: May Mon 20, 2019 9:43 pm 
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After communication with Lud Sibley I have learned that this tube is a duplicate of the one in the TCA collection. I doubt it is a magnatron because the tube is constructed such that it cannot be conventionally placed in a magnet. Perhaps small magnets of some type were inserted in the glass wells supporting the toroid element. However, it does appear that the tube was used for high frequency oscillation or modulation. Both Lud's tube and this tube have one getter flash that has gone white and one unflashed getter. Apparently it was anticipated that some outgassing may be a problem during testing and experiments. One cannot really assess a cost for an experimental tube yielding no production type. All development cost become unrecoverable sunk costs yielding an education of what not to do in the future.

Norman

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